摘要:
A lens barrel has its collapsed length that can be further decreased by removing unnecessary space and bringing lens groups close to each other and a photographic apparatus incorporates the lens barrel. When the lens barrel is collapsed, at least a fourth lens group is retracted from a photographic optical axis by an advance/retract mechanism. In that case, a first lens group and third lens group are aligned along the optical axis and stuffed into the lens barrel, the fourth lens group is placed on the top, bottom, right, or left side of these lenses, and a second lens group is placed on the top, bottom, right, or left side of the first and third lens groups. This reduces the length of the lens barrel. During extension, the second and fourth lens groups are advanced onto the photographic optical axis by the advance/retract mechanism to extend the lens barrel greatly.
摘要:
A self light-emitting device 1 has spherical photo-electric converting elements 2 that have a substantially spherical acceptance surface, respectively; a light emitting diode 3 that emits light using electric power generated by the spherical photo-electric converting elements 2; a control circuit 5; and a sealing member 4 that integrates the spherical photo-electric converting elements 2, the light emitting diode 3 and the control circuit 5. The control circuit 5 is equipped with a light emitting control circuit where a photo-detecting sensor 23 is incorporated, a charge control circuit and a condenser. Since the acceptance surface of the spherical photo-electric converting elements 2 is substantially spherical, electric power is generated due to incidental light from any angle. Since the sealing member 4 integrates the constructional elements, so the device is difficult to damage.
摘要:
A lens barrel has its length which is reduced by dispensing with guide rods or a travel mechanism long extending from a base which fixes an image pickup device. The optical axes of multiple lens groups can be easily aligned. An image taking apparatus has its body which has the lens barrel incorporated into it. A second lens group, third lens group and, via the travel mechanism, a fourth lens group are supported by a straight-ahead key ring, and the straight-ahead key ring also supports a front tube holding the first lens group. A zoom motor and a focus motor are also supported by the straight-ahead key ring.
摘要:
A negative-lead type zoom lens has a diffractive optical element and is led by a lens unit having a negative optical power. In this zoom lens, various kinds of aberration including chromatic aberration are excellently corrected by properly setting the lens configuration of each lens unit so as to achieve high optical performance over the entire range of a variable power while the entire lens system is miniaturized and designed to have a wide angle. The zoom lens according to the present invention is suitable for a zoom lens with a wide angle including a wide-angle region that is a focal length of substantially 28 mm on a 35 mm single lens reflex camera basis.
摘要:
A telephone system requiring no upload of station data which is reset or set after a seat change even if the station data is not uploaded to a data management equipment whenever the operation change the station data of an extension communication terminal. Each of the extension communication terminals judges, on receiving a seat-change instruction, whether or not its station data is changed. If the station data is judged to be changed, the station data is uploaded to the data management equipment through a switching system.
摘要:
A windowpane antenna apparatus for vehicles according to the present invention includes a defogger mounted on a window of a vehicle, for defogging the window, means for causing the defogger to serve as a slot antenna, and a driven antenna arranged close and opposite to the defogger with a given gap therebetween in such a manner that one side of the driven antenna is mutually coupled to one side of the defogger.
摘要:
A communication area of a left pressure reception chamber, a pressure reception chamber, a right pressure reception chamber and another pressure reception chamber for moving a spool to first and second positions with a first pump port and a second pump port is made large at the beginning of a stroke, small at the intermediate of the stroke and medium at the end of the stroke so as to return the spool from the first and second positions to the neutral position in a short time while preventing cavitation from occurring. While the volume of the pressure reception chamber located opposite to the moving direction of the spool is prevented from changing, the spool is moved slowly in the above-described opposite direction. Thus, the spool is prevented from making an over-stroke and also prevented from having a hunching even if a return pressure oil has a large change in pressure.
摘要:
An apparatus for performing the printing by scanning a carriage having a plurality of print heads mounted in a predetermined direction relative to the printing medium, so that an image is formed to have a desired color tone and density without decreased throughput. Conversion data for reproducing the color tone and the scan range of the carriage are changed in accordance with the used heads among the mounted heads. Also, the replaceability can be enhanced and the longer life for each group is attained by grouping the heads mounted. Further, the scan range of recording and the scan range for the recovery can be changed by selecting the group for use in accordance with the recording mode. Also, in an ink jet printing apparatus having a longer print length, a printing method for effecting the stable recording is provided.
摘要:
A magnetic field source movable type phantom head has a vessel filled with physiologic saline. The vessel preferably has an inner contour corresponding to an outer contour of a cerebrum of a patient to be tested. An electrode support tube has electrodes at one end. The electrodes are arranged within the vessel and movable at least in a vertical direction toward a center of the vessel as guided by a guiding and fixing device which guides the electrode support tube in a liquid tight fashion and fixes at a predetermined position. A position of the electrode support tube is measured to determine a position of the magnetic field source in the vessel.
摘要:
A zoom lens includes a first lens group having a positive refracting power, a second lens group having a negative refracting power, a third lens group having a positive refracting power, a fourth lens group having a negative refracting power, and a fifth lens group having a positive refracting power in this order from the object side in order to perform zooming by varying the distance between the lens groups, the fifth lens having at least one positive lens and a cemented lens which has a negative refractive index as a whole, its positive lens being cemented to its negative lens, and the cemented surface being convex on the image side.